Sand coated with a mixture of phenolic resin and carboxylic...

Details Sand coated with a mixture of phenolic resin and carboxylic... Sand coated with a mixture of phenolic resin and carboxylic...

B - Operations, Transporting

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B01J 13/02 (2006.01) B22C 1/02 (2006.01) B22C 1/22 (2006.01) C08K 5/098 (2006.01) C08L 61/06 (2006.01) C08L 33/02 (2006.01)

Patent

CA 1193921

ABSTRACT A resin coated sand for shell-molding processes is provided comprising the coating of foundry sand or aggregates with a phenolic resin and a carboxylic acid salt. The carboxylic acid salt is selected from a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIa, VIIb or VIII of the Periodic Table of Elements. The proportion of carboxylic acid salt to phenolic resin is from 0.5 to 40 parts carboxylic acid salt to 100 parts phenolic resin. This resin coated sand produces shell-molds having excellent properties for casting, and allows the molded article to be removed in an easy and efficient manner.

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